@article{MZ_1975__143_172211,
     author = {Ib Madsen},
     title = {Higher {Torsion} in {SG} and {BSG.}},
     journal = {Mathematische Zeitschrift},
     pages = {55--80},
     year = {1975},
     volume = {143},
     zbl = {0322.55030},
     url = {http://geodesic.mathdoc.fr/item/MZ_1975__143_172211/}
}